混凝土外加剂和水泥的适应性问题研究

分析了影响混凝土外加剂与水泥适应性的因素及其内在机理,提出了改善混凝土外加剂与水泥适应性的措施,并对混凝土外加剂与水泥适应性问题的研究方向进行了展望,以充分发挥混凝土外加剂的作用。     

影响混凝土外加剂与水泥适应性的主要因素

通过外加剂与水泥的适应效果的论述,指出了影响混凝土外加剂与水泥适应性的主要因素,并提出了改善外加剂与水泥适应性的一些措施。     

浅谈混凝土外加剂与水泥适应性

结合混凝土外加剂作用原理，介绍了影响混凝土外加剂与水泥适应性的因素，包括外加剂掺量，掺加工艺，品种，水泥等，阐述了解决混凝土外加剂与水泥适应性的方法，以期指导实践。     

混凝土外加剂与水泥适应性的探讨

混凝土外加剂与水泥适应性问题长期存在于工程,并对工程质量产生较大的影响。本文主要讲述了影响混凝土外加剂与水泥适应性的两大机理:外加剂对水泥的扩散作用和水泥对外加剂的吸附作用。并对影响这两大机理的因素进行分析。     

混凝土外加剂与水泥适应性的改善措施

从分析混凝土外加剂与水泥适应性的影响因素及其规律入手，提出了改善外加剂与水泥适应性的可操作性措施，如增加外加剂掺量、改变外加剂复合方案、添加阴离子、优化水泥制备工艺及消除引起不适应性的因素等，并例举了2个工程应用实例，     

浅谈混凝土外加剂与水泥适应性的改善措施

从分析混凝土外加剂与水泥适应性的影响因素及其影响规律入手,提出改善外加剂与水泥适应性的可操作性措施,如增加外加剂掺量、改变外加剂复合方案。优化水泥制备工艺。消除或减少引起不适应性的因素等。     

改善水泥与外加剂适应性是改变同质化竞争的重要手段

针对水泥产品同质化程度越来越高的现实情况,指出改善水泥与混凝土外加剂的适应性是改变同质化、提高水泥企业市场竞争力的重要手段,具体分析了影响水泥与外加剂适应性的各种因素,提出了改善水泥品质的措施。     

浅谈混凝土外加剂对水泥的适应性

介绍了外加剂在不同水泥中的应用效果 ,并就外加剂对水泥的适应性的影响进行了分析 ,提出了解决外加剂对水泥适应性的改进方法 ,以使外加剂能够得到更加广泛的应用     

水泥与聚羧酸系高性能减水剂适应性影响因素分析

在预拌高强混凝土时要注意水泥与聚羧酸减水剂适应性问题.水泥厂家为了达到节省成本的效果,在水泥里面添加外加剂,可能导致水泥质量受到影响,同时致使水泥与聚羧酸系高性能减水剂适应性出现问题,但同时外加剂厂家也在调整和改变其性能,确保外加剂和水泥之间能更好地适应.本文主要阐述了影响水泥与聚羧酸系高性能减水剂适应性的因素以及改善...     

外加剂与水泥适应性及其工程应用

分析了外加剂与水泥适应性问题产生的原因,介绍了外加剂与水泥适应性试验的方法,提出了在工程中应采取的措施,以避免因适应性不良造成的损失,从而确保混凝土工程的质量。     

Zustandsuntersuchung und Instandsetzung am Hauptdach des Hauses der Kulturen der Welt in Berlin

The main roof of the ”Haus der Kulturen der Welt“ in Berlin Which is very well‐known on account of its history and striking structural design – was to be inspected by the author to determine its condition and analysed with regard to the durability of the existing liquid synthetic sealant. The roof structure consists of a biaxial, curved area‐covering structural element with circumferential edge beams of pre‐stressed lightweight concrete. This is the result of the reconstruction between 1984 and 1987 following a partial collapse of the then Berlin Congress Hall in 1980. The very thin roof shell is also made of lightweight concrete and, like the edge beams, has a polyurethane‐based spray‐on seal that was specially developed for this purpose as protection against the ingress of moisture. The reason why this, at the time, novel type of seal was chosen was that it should take into account the fact that the roof design urgently needed some kind of protection against moisture that had to compensate the expected changes shape and crack movements of the roof with no damage. The following article reports on the nature, scope and main results of the analysis of the condition of the roof seal, edge beams and abutments. It will also describe the repair recommendations resulting from the investigations, which form the basis of the execution of work at the present point in time. Apart from presenting the technical principles and special features of the building that have to be taken into account during any repairs, the special features of the execution will also be addressed.     

Magnetoelastische Spannkraftmessung in Bauwerken

Magnetoelastic Measurement of Prestressing Force in Civil Structures The knowledge of the tensile force of prestressing steel elements and its reliable and non‐destructive determination are of essential importance for the assessment of the structural health condition of prestressed concrete structures and tie‐back systems in terms of structural safety, serviceability and durability. For the evaluation of the prestressing force in steel tension members, the measurement technique presented in this contribution is using the magneto‐elastic effect (ME‐effect) of ferromagnetic materials. This effect describes the reverse‐proportional correlation between the mechanical stress and the magnetic properties of ferromagnetic materials. The cylindrical coiled sensors pushed over the tendon and the measuring device developed and practically optimized at the iBMB/MPA of the TU Braunschweig enable a fast and reliable measurement of the prestressing steel force after an initial calibration. In this contribution first the state of the art of prestress measurement techniques for steel tension members is presented. Afterwards, the ME‐measuring method with the basics and merits of magneto‐elastic prestressing force identification is shown. Further recent research results as well as several building applications will be discussed.     

机制砂在隧道耐久性混凝土运用中的质量控制

从母岩的选料、级配控制、石粉和泥土含量控制三个方面阐述了控制机制砂质量的重要性，并提出了可将隧道混凝土机制砂的石粉含量限值放宽到10％的建议，以促进耐久性混凝土的研究。     

项目临时性组织性质的研究

指出从组织论角度看项目具有临时性组织的性质，对项目的定义进行了思考，从生产功能、代理机构、代理不确定性事务及项目管理者角度论述了作为临时性组织的项目，以促进对项目的理解和研究。     

Die neue Lahntalbrücke Limburg im Zuge der BAB 3 – Wettbewerb und Entwurf

The new bridge over the river Lahn near Limburg as part of BAB 3, Germany – Competition and Design The effort of the responsible engineers and architects at the Lahntalbrücke Limburg always becomes clear when a new well‐designed bridge structure is needed for the representative Lahn valley. To handle the steadily increasing traffic prestressed concrete structures have gained acceptance for both replacement constructions. Both constructions also convince optically through their simplicity while leaving the creative presence of the cathedral in the valley unchanged.     

回归“生活世界”的上海居住小区新模式分析

本文从上海城市文化特点的角度出发,以“生活世界”哲学为基础,对现阶段居住小区设计模式进行了分析。认为“现实生活世界”是上海当代居住小区设计的起点和归宿。也只有这样,才能使新时代的空间形态与生活形态再次整合,创造出新时代的美好人居。     

基于OBE-CDIO 理念的工程管理专业BIM 实践教学改革

为冲破阻碍当前建筑行业发展的人才匮乏瓶颈，工程管理专业BIM 实践教学亟待改革。对标行业需求，将OBE-CDIO理念引入BIM 实践教学改革以培养与行业需求相匹配的能力。基于OBE 理念确定培养目标，指导BIM 实践教学框架设计，并合理分配所需理论知识点进入各相关理论课程；再以CDIO 理念指导实践教学过程，实现对建模能力、专业分析能力、目标控制能力的培养，满足行业对工程管理专业人才BIM 能力的需求。     

浅谈室内色彩设计的方法

提出了室内设计中色彩设计的原则,从色彩在室内设计中的作用、功能及使用者的心理等方面进行了探讨,以提高人们对色彩的认识,充分发挥色彩设计的作用,更好地满足消费者的需求.     

化辱为荣，补损成益——审视央视新楼并及奥运纪念碑等

针对央视新厦之设计弊端及库氏之流所称邪淫形象,提出改扩建设想及相应建议。从造形立意、结构体系、消防安全等分述改善措施,且将变更业主、转换功能及融资渠道等亦考虑其中。反对以重金建造全球史无前例之奥运纪念碑,申明现有奥运场馆即为最佳纪念实物。主张起诉库氏、矶氏,消除恶劣影响,结合改扩建,进而达致“化辱为荣,补损成益”。     

Beanspruchung der Tunnelabdichtung durch den Herstellvorgang einer Tunnelinnenschale

Loading of the tunnel sealing system due to fresh concrete pressure This report deals with the loading of the geomembrane during the construction phase of the inner shell of a tunnel. In a systematic parameter analysis at the institute for underground construction at FH Münster the geomembrane and the geotextile were tested under different realistic conditions. Laboratory testing showed a dependence on the seal support surface of the shotcrete and on the characteristics of the geotextile. The deformations of the membranes due to fresh concrete pressure are significantly smaller than the permitted values in the technical regulations. The main results of the investigations are described below.